Scale-connector.



I PATENTED DEC. 3, 1907. J. OSTLUND & W. SANDBERG.

SCALE CONNECTOR. APPLIOATION rnmn Jumzis. 1901.

Ada /143 s rHz NORRiS PETERS 50., WASHINGTON, n. c.

UNITE STATES TNT UFFICE.

SCALE-CONNECTOR.

Specification of Letters Patent,

Patented Dec. 3, 1907.

Application filed June 13. 1907. Serial No. 378.760.

To all whom it may concern:

Be it known that we, JOHN Gs'rLUND and WILLIAM SANDBERG, subjects of the King of Sweden, residing at Braddock, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Scale-Connectors, of which the following is a specification, reference be ing had therein to the accompanying drawmg.

This invention relates to scale connecting devices and its primary object is to provide simple and inexpensive means for connecting two graduated scales together end. to end.

Further objects of the invention are to provide means for connecting two scales of different width together end to end and also for connecting two scales at right angles to each other.

The construction of the improvement will be fully described hereinafter in connection with the accompanying drawing which forms a part of this specification, and its novel features will be defined in the appended claims.

In the drawing, Figure 1 is a top plan view of the device connecting two scales together end to end, Fig. 2 is a reverse or bottom plan of the same, Fig. 3 is a plan view showing the improvement connecting two scales at right angles to each other, Fig. 4 is a view in perspective of the plate or body portion of the device with its attachments removed, Fig 5 is a view in perspective of one of the slotted keepers employed, Fig. 6 is a bottom plan of Fig. 8, Fig. 7 is a detail perspective of one of the screws with a cleat secured thereto, and provided with a thumb nut, and Fig. 8 is a section on the line 88 of Fig. 3. j

The reference numeral 1 designates a rectangular plate formed at one side with parallel slots 2 and 3, and at one end with a slot 4. Projecting from the upper side of the plate 1 adjacent to the edge opposite the slots 2 and 3 are two screw-threaded pins 5 and 6, and a third threaded pin 7 projects centrally from the plate. Along the under side of the plate at the edge thereof below the screw 5 is a flange 8 extending half the length of the plate, and a lug 9 depends from the same edge of the plate at the end thereof. In connection with the slotted plate, I employ two keepers 10 and 11, each formed with a central longitudinal slot 12 and at one end with a depending stud 13. The

over the pin 5, and the keeper 11 over the pin 6, said pins extending through one end of the slots of the keepers. Thumb nuts 16 and 17 are then fitted upon the ends of the threaded pins 5 and 6 to retain the keepers therein. Through the slots 2 and 3 of the plate and through the adjacent ends of the slots of the two keepers extend screws 18 and 19 each having a cleat 20 secured to its lower end. Thumb nuts 21 fit upon these screws to secure the cleats, the under surface of each of said nuts being countersunk as shown in Fig. 8 to receive a coil spring 22.

As illustrated in Fig. 2, the ends of the scales 14- and 15 abut on the under side of the plate'l one edge of said scales bearing against the flange 8 and lug 9, while the cleats 19 overlap the opposite edge of the scales. By screwing down the nuts 16, 17 and 21 tightly, the ends of the scales are firmly clamped to the plate 1. As the screws 18 and 19 are readily adjustable within the slots 2 and 3, it will be apparent that scales of varying width may be connected together. When it is desired to connect two scales together at right angles to each other, the nut 16 is removed to release one end of the keeper 10, and the nut 21 which secures the opposite end of the keeper is also removed. The screw 18 is then slipped out of the slot 2 and into the slot 1 of the plate. The keeper 10 is then removed from the pin 5 and fitted over the pin 7 and screw 18 and the nut 16 is screwed upon the pin 7 and the nut 21 upon the screw 18. As shown in Fig. 6, this adjustment of the parts brings the cleats 20 secured to the screw 18 into positionacross the end of the plate at right angles to the other cleat 20. The scale 14 rests against the end of the scale 15 and against the lug 23 projecting from the under side of the plate. The keeper 10 is made slightly longer than the keeper 11 to permit it to be secured upon the central pin 7 and the screw 18 as shown in Fig. 8. An indentation 24 is formed near one edge of the plate 1 midway of its length to adapt the device to strike centers in laying out work as well as to aid in describingangles and straight lines. The springs 22 serve to hold the cleats 20 firmly against the under sides of the plate 1.

The improvement is especially adapted for use in projecting angles in laying out work of various kinds but is useful wherever the joining of graduated scales is required.

, That I claim and desire to secure by Letters Patent, is

1. A connecting device for scales comprising a slotted plate, provided with stops against which the edges of the scales bear, slotted keepers on theupper side of said plate, stationary threaded pins extending through said keepers, thumb nuts on said pins, adjustable screws extending through the slots in the plate, and cleats secured to said screws on the under side of the plate.

2. A connecting device for scales comprising a plate formed on one side with parallel slots, and with a longitudinal slot at one end, and having integral stops on its underside, stationary threaded pins projecting from the upper side of the plate, longitudinally slotted keepers through which the pins extend, thumb-nuts on said pins, adjustable screws extending through the slots of the plate and through said keepers, cleats on the ends of said screws below the plate adapted to over lap the scales, and thumb nuts on screws.

3. A connecting device for scales, comprising a plate formed on one side with parallel slots, and with a longitudinal slot at one end, and having integral stops on its under side, stationary threaded pins projecting from the upper side of the plate, slotted keepers through which said pins extend, thumb nuts on said pins, adjustable screws extending through the slots of the plate and keepers, cleats secured to the ends of the screws below the plate and adapted to overlap the scales, countersunk thumb-nuts on said screws, and coil springs within the countersunk portions of said nuts.

4. A connecting device for scales con1pris ing a plate formed at oneside with parallel transverse slots and at one end with a longi tudinal slot, two threaded pins projecting from one side of the upper surface of the plate, a centering indentation between said pins, a third threaded pin projectin centrally from the plate, longitudinally silotted keepers adapted to fit over said pins, adjustable screws fitting the slots of the plate, cleats secured to said screws on the under side of said plate and adapted to overlap the scales, stops on the under side of said plate against which the edges of the scales rest, and spring-pressed thumb-nuts on said screws.

In testimony whereof we aflix our signatures in the presence of two witnesses.

JOHN OSTLUND. WILLIAM SANDBERG.

Witnesses MAX H. SROLOVITZ, F. O. MCCLEARY. 

